<template>
    <div class="todo-footer">
      <label>
        <input type="checkbox" v-model="DoneAll"/>
      </label>
      <span>
          <span>已完成 {{addDone}}</span> / 全部{{todoList.length}}
        </span>
      <button class="btn btn-danger" @click="deleteDoneAll">清除已完成任务</button>
    </div>
</template>


<script>
export default {
  name:"Footer",
  props:["deleteDoneAll","todoList","changeAllDone"],
  computed:{
    addDone(){
     return this.todoList.reduce((p,c)=>{
        if(c.done){
          p++
        }
        return p
      },0)
    },
    DoneAll:{
      get(){
        return this.addDone === this.todoList.length && this.todoList.length
      },
      set(newVal){
        console.log(newVal)
        this.changeAllDone(newVal)
      }
    }
  }
}
</script>


<style>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>